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Finding the Fourth Proportional to 288,307.68, 398,051.60 and 258,040.48

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Solution

The fourth proportional to 288,307.68, 398,051.60 and 258,040.48 is: 356,263.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,307.68 : 398,051.60 = 258,040.48 : x
  2. Step 2: Convert to fraction form
    288,307.68/398,051.60 = 258,040.48/x
  3. Step 3: Cross multiply
    288,307.68x = 398,051.60 × 258,040.48
  4. Step 4: Simplify right side
    288,307.68x = 102,713,425,928.77
  5. Step 5: Solve for x
    x = 102,713,425,928.77/288,307.68
  6. Step 6: Final answer
    x = 356,263.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.